What maintenance practice is essential for ensuring a reciprocating engine's longevity?

Periodic inspection and servicing are critical for ensuring the longevity of a reciprocating engine. This practice involves regularly checking and maintaining various engine components, including the oil, filters, spark plugs, and cooling systems. By conducting inspections, you can identify wear and tear, detect potential issues before they become severe problems, and ensure that all parts are functioning as intended. Preventive maintenance is key to keeping the engine running smoothly and efficiently, which ultimately helps in extending its operational life and reliability.

Other options do not align with best practices for engine maintenance. Changing oil only every few years can lead to contaminants building up, which may harm engine performance. Constantly operating at peak power can lead to increased wear and risk of overheating, while using low-grade fuel can result in poor engine performance and possible damage due to detonation or inefficient combustion. Therefore, routine inspections and servicing stand out as the most effective method for maintaining a reciprocating engine over time.